Some Shader Help please - GameCreators Forum

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fubarpk

Retired Moderator

19

Years of Service

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Joined: 11th Jan 2005

Playing: AGK is my friend

Posted: 1st Mar 2019 16:30 Edited at: 1st Mar 2019 16:57

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I have a shader that kinda works but the mouse calculations are messed up

// set window properties
SetWindowTitle( "thingy" )
SetWindowSize( 1024, 768, 0 )
SetWindowAllowResize( 1 ) // allow the user to resize the window

// set display properties
SetVirtualResolution( 1024, 768 ) // doesn't have to match the window
SetOrientationAllowed( 1, 1, 1, 1 ) // allow both portrait and landscape on mobile devices
SetSyncRate( 30, 0 ) // 30fps instead of 60 to save battery
SetScissor( 0,0,0,0 ) // use the maximum available screen space, no black borders
UseNewDefaultFonts( 1 ) // since version 2.0.22 we can use nicer default fonts

createShaderFile()
CreateSprite(1,0)
SetSpriteSize(1,1024,768)
SetSpritePosition(1,0,0)
LoadSpriteShader(1,"thingy.ps")
SetSpriteShader( 1,1 )

SetShaderConstantByName(1,"resolution",1024,768 ,0,0)
do 
	SetShaderConstantByName(1,"time",timer(),0,0,0)
	SetShaderConstantByName(1,"mouse",GetPointerX(),getPointery(),0,0)
	
    sync()   
loop
function createShaderFile()

fw=OpenToWrite("thingy.ps")

WriteLine(fw,"#ifdef GL_ES")
WriteLine(fw,"precision mediump float;")
WriteLine(fw,"#endif")
WriteLine(fw,"#extension GL_OES_standard_derivatives : enable")
 
WriteLine(fw,"")
WriteLine(fw,"uniform float     time;    ")
WriteLine(fw,"uniform vec2      mouse;          // mouse pixel coords. xy:")
WriteLine(fw,"uniform vec2      resolution;     // viewport resolution (in pixels)")
WriteLine(fw,"uniform sampler2D backbuffer;")

WriteLine(fw,"float Hash( vec2 p,  float s)")
WriteLine(fw,"{")
WriteLine(fw,"    vec3 p2 = vec3(p.xy,10.0 * abs(sin(s)));")
WriteLine(fw,"    return fract(sin(dot(p2,vec3(27.1,61.7, 12.4)))*273758.5453123);")
WriteLine(fw,"}")
 
WriteLine(fw,"float noise(vec2 p, float s)")
WriteLine(fw,"{")
WriteLine(fw,"    vec2 i = floor(p);")
WriteLine(fw,"    vec2 f = fract(p);")
WriteLine(fw,"    f *= f * f * (3.0-2.0*f);")
 
WriteLine(fw,"    return mix(mix(Hash(i + vec2(0.,0.), s), Hash(i + vec2(1.,0.), s),f.x),")
WriteLine(fw,"               mix(Hash(i + vec2(0.,1.), s), Hash(i + vec2(1.,1.), s),f.x),")
WriteLine(fw,"               f.y) * s;")
WriteLine(fw,"}")
 
WriteLine(fw,"float factor(float len, float s, float e){")
WriteLine(fw,"	float v1 = 1.0 - 1.0 / exp(pow((s-len) * 6.0,2.0));")
WriteLine(fw,"	v1 = clamp(v1, 0.0, 1.0);")
WriteLine(fw,"	float v2 = 1.0 - 1.0 / exp(pow((len-e) * 6.0,2.0));")
WriteLine(fw,"	v2 = clamp(v2, 0.0, 1.0);")
WriteLine(fw,"	return (1.0-step(len,s))*v1 * (step(len,e))*v2;")
WriteLine(fw,"}")
 
WriteLine(fw,"float fbm(vec2 uv,float t,float len){")
WriteLine(fw,"     float v = 0.0;")
WriteLine(fw,"     vec2 p = uv+t;")
WriteLine(fw,"     v += noise(p*.5, 0.35);")
WriteLine(fw,"     v -= noise(p*2., 0.25);")
WriteLine(fw,"     v -= noise(p*4., 0.125);")
WriteLine(fw,"     v += noise(p*8., 0.0625);")
WriteLine(fw,"     return v*factor(length(uv),0.0,len);")
WriteLine(fw,"}")
 
WriteLine(fw,"vec2 rotate(vec2 uv,float degree){")
WriteLine(fw,"	mat2 rot = mat2(cos(degree),-sin(degree),sin(degree),cos(degree));")
WriteLine(fw,"	return rot*uv;")
WriteLine(fw,"}")

WriteLine(fw,"void main( void ) {")
WriteLine(fw,"	float size = min(resolution.x, resolution.y);")
WriteLine(fw,"	vec2 uv = gl_FragCoord.xy / size * 2.0 - resolution/size;")
WriteLine(fw,"	uv.x *= resolution.y/ resolution.x;")
WriteLine(fw,"	vec2 touch = 2.0 * mouse  - vec2(1.0);")
WriteLine(fw,"	uv = rotate(uv,atan(touch.y,touch.x));")	
WriteLine(fw,"	float timeMult = 1.0;")
WriteLine(fw,"	vec3 finalColor; ")
WriteLine(fw,"	float t = 0.025 / distance(uv, vec2(clamp(uv.x,0.0,length(touch)),fbm(uv,time*timeMult,length(touch))));")
WriteLine(fw,"	finalColor = 0.3 * texture2D(backbuffer,gl_FragCoord.xy / resolution).rgb + t * vec3( 0.5, 0.5, 0.8 );")
WriteLine(fw,"	gl_FragColor =  vec4( finalColor, 1.0 );")
WriteLine(fw,"}")
CloseFile(fw)
endfunction

+ Code Snippet

// set window properties
SetWindowTitle( "thingy" )
SetWindowSize( 1024, 768, 0 )
SetWindowAllowResize( 1 ) // allow the user to resize the window

// set display properties
SetVirtualResolution( 1024, 768 ) // doesn't have to match the window
SetOrientationAllowed( 1, 1, 1, 1 ) // allow both portrait and landscape on mobile devices
SetSyncRate( 30, 0 ) // 30fps instead of 60 to save battery
SetScissor( 0,0,0,0 ) // use the maximum available screen space, no black borders
UseNewDefaultFonts( 1 ) // since version 2.0.22 we can use nicer default fonts

createShaderFile()
CreateSprite(1,0)
SetSpriteSize(1,1024,768)
SetSpritePosition(1,0,0)
LoadSpriteShader(1,"thingy.ps")
SetSpriteShader( 1,1 )

SetShaderConstantByName(1,"resolution",1024,768 ,0,0)
do 
	SetShaderConstantByName(1,"time",timer(),0,0,0)
	SetShaderConstantByName(1,"mouse",GetPointerX(),getPointery(),0,0)
	
    sync()   
loop
function createShaderFile()

fw=OpenToWrite("thingy.ps")

WriteLine(fw,"#ifdef GL_ES")
WriteLine(fw,"precision mediump float;")
WriteLine(fw,"#endif")
WriteLine(fw,"#extension GL_OES_standard_derivatives : enable")
 
WriteLine(fw,"")
WriteLine(fw,"uniform float     time;    ")
WriteLine(fw,"uniform vec2      mouse;          // mouse pixel coords. xy:")
WriteLine(fw,"uniform vec2      resolution;     // viewport resolution (in pixels)")
WriteLine(fw,"uniform sampler2D backbuffer;")

WriteLine(fw,"float Hash( vec2 p,  float s)")
WriteLine(fw,"{")
WriteLine(fw,"    vec3 p2 = vec3(p.xy,10.0 * abs(sin(s)));")
WriteLine(fw,"    return fract(sin(dot(p2,vec3(27.1,61.7, 12.4)))*273758.5453123);")
WriteLine(fw,"}")
 
WriteLine(fw,"float noise(vec2 p, float s)")
WriteLine(fw,"{")
WriteLine(fw,"    vec2 i = floor(p);")
WriteLine(fw,"    vec2 f = fract(p);")
WriteLine(fw,"    f *= f * f * (3.0-2.0*f);")
 
WriteLine(fw,"    return mix(mix(Hash(i + vec2(0.,0.), s), Hash(i + vec2(1.,0.), s),f.x),")
WriteLine(fw,"               mix(Hash(i + vec2(0.,1.), s), Hash(i + vec2(1.,1.), s),f.x),")
WriteLine(fw,"               f.y) * s;")
WriteLine(fw,"}")
 
WriteLine(fw,"float factor(float len, float s, float e){")
WriteLine(fw,"	float v1 = 1.0 - 1.0 / exp(pow((s-len) * 6.0,2.0));")
WriteLine(fw,"	v1 = clamp(v1, 0.0, 1.0);")
WriteLine(fw,"	float v2 = 1.0 - 1.0 / exp(pow((len-e) * 6.0,2.0));")
WriteLine(fw,"	v2 = clamp(v2, 0.0, 1.0);")
WriteLine(fw,"	return (1.0-step(len,s))*v1 * (step(len,e))*v2;")
WriteLine(fw,"}")
 
WriteLine(fw,"float fbm(vec2 uv,float t,float len){")
WriteLine(fw,"     float v = 0.0;")
WriteLine(fw,"     vec2 p = uv+t;")
WriteLine(fw,"     v += noise(p*.5, 0.35);")
WriteLine(fw,"     v -= noise(p*2., 0.25);")
WriteLine(fw,"     v -= noise(p*4., 0.125);")
WriteLine(fw,"     v += noise(p*8., 0.0625);")
WriteLine(fw,"     return v*factor(length(uv),0.0,len);")
WriteLine(fw,"}")
 
WriteLine(fw,"vec2 rotate(vec2 uv,float degree){")
WriteLine(fw,"	mat2 rot = mat2(cos(degree),-sin(degree),sin(degree),cos(degree));")
WriteLine(fw,"	return rot*uv;")
WriteLine(fw,"}")

WriteLine(fw,"void main( void ) {")
WriteLine(fw,"	float size = min(resolution.x, resolution.y);")
WriteLine(fw,"	vec2 uv = gl_FragCoord.xy / size * 2.0 - resolution/size;")
WriteLine(fw,"	uv.x *= resolution.y/ resolution.x;")
WriteLine(fw,"	vec2 touch = 2.0 * mouse  - vec2(1.0);")
WriteLine(fw,"	uv = rotate(uv,atan(touch.y,touch.x));")	
WriteLine(fw,"	float timeMult = 1.0;")
WriteLine(fw,"	vec3 finalColor; ")
WriteLine(fw,"	float t = 0.025 / distance(uv, vec2(clamp(uv.x,0.0,length(touch)),fbm(uv,time*timeMult,length(touch))));")
WriteLine(fw,"	finalColor = 0.3 * texture2D(backbuffer,gl_FragCoord.xy / resolution).rgb + t * vec3( 0.5, 0.5, 0.8 );")
WriteLine(fw,"	gl_FragColor =  vec4( finalColor, 1.0 );")
WriteLine(fw,"}")
CloseFile(fw)
endfunction

Its meant to be a kinda lightning thingy that starts at the centre of the screen and follows the mouse around
but the mouse positioning is kinda wrong.

Was thinking it could perhaps work for somekind of weird game where there are objects around you that you can
kinda destroy by moving the lightning thingy around.

Any suggestions on how I could get the mouse positioning fixed would be greatly appreciated
Thanks in Advance

fubar

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puzzler2018

User Banned

Posted: 1st Mar 2019 19:30 Edited at: 1st Mar 2019 19:35

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Hi

I think i know what you trying to acheive - but my shader knowlegde is rubbish - i shall take a look more tomorrow.

Maybe just a few mathematic equation commands in wrong places maybe..

But this certainly does bring me an idea of a dynamically shader language viewer - an editor which automatically loads in the shader code, examples from glslsandbox.com and runs it straight away. - but thats for future.

Tier 1 Developer

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janbo

16

Years of Service

User Offline

Joined: 10th Nov 2008

Location: Germany

Posted: 2nd Mar 2019 10:12

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Quick fix at line 86~87:

+ Code Snippet

WriteLine(fw,"	vec2 touch = resolution*0.5-mouse;")
WriteLine(fw,"	uv = rotate(uv,atan(touch.y,-touch.x));")

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fubarpk

Retired Moderator

19

Years of Service

User Offline

Joined: 11th Jan 2005

Playing: AGK is my friend

Posted: 2nd Mar 2019 15:39 Edited at: 2nd Mar 2019 16:14

Link

Thanks Janbo

Its certainly allot closer than what I had now just wondering how to make it so the length only goes from the centre to the mouse position
perhaps adventually 2 vectors passed one start pos and 2nd mouse pos

fubar

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janbo

16

Years of Service

User Offline

Joined: 10th Nov 2008

Location: Germany

Posted: 3rd Mar 2019 13:00

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I see:

// set window properties
SetWindowTitle( "thingy" )
SetWindowSize( 1024, 768, 0 )
SetWindowAllowResize( 1 ) // allow the user to resize the window

// set display properties
SetVirtualResolution( 1024, 768 ) // doesn't have to match the window
SetOrientationAllowed( 1, 1, 1, 1 ) // allow both portrait and landscape on mobile devices
SetSyncRate( 30, 0 ) // 30fps instead of 60 to save battery
SetScissor( 0,0,0,0 ) // use the maximum available screen space, no black borders
UseNewDefaultFonts( 1 ) // since version 2.0.22 we can use nicer default fonts

createShaderFile()
CreateSprite(1,0)
SetSpriteSize(1,1024,768)
SetSpritePosition(1,0,0)
LoadSpriteShader(1,"thingy.ps")
SetSpriteShader( 1,1 )

SetShaderConstantByName(1,"resolution",1024,768 ,0,0)
SetShaderConstantByName(1,"speed",1.0,0,0,0)
SetShaderConstantByName(1,"color",0.8,0.5,0.5,0)
SetShaderConstantByName(1,"width",0.015,0,0,0)

do
	SetShaderConstantByName(1,"time",timer(),0,0,0)
	SetShaderConstantByName(1,"mouse",GetPointerX(),getPointery(),0,0)

sync()
loop
function createShaderFile()

fw=OpenToWrite("thingy.ps")

WriteLine(fw,"#ifdef GL_ES")
WriteLine(fw,"precision mediump float;")
WriteLine(fw,"#endif")
WriteLine(fw,"#extension GL_OES_standard_derivatives : enable")

WriteLine(fw,"")
WriteLine(fw,"uniform float     speed;    ")
WriteLine(fw,"uniform vec3      color;    ")
WriteLine(fw,"uniform float     width;    ")
WriteLine(fw,"uniform float     time;    ")
WriteLine(fw,"uniform vec2      mouse;          // mouse pixel coords. xy:")
WriteLine(fw,"uniform vec2      resolution;     // viewport resolution (in pixels)")
WriteLine(fw,"uniform sampler2D backbuffer;")

WriteLine(fw,"float Hash( vec2 p,  float s)")
WriteLine(fw,"{")
WriteLine(fw,"    vec3 p2 = vec3(p.xy,10.0 * abs(sin(s)));")
WriteLine(fw,"    return fract(sin(dot(p2,vec3(27.1,61.7, 12.4)))*273758.5453123);")
WriteLine(fw,"}")

WriteLine(fw,"float noise(vec2 p, float s)")
WriteLine(fw,"{")
WriteLine(fw,"    vec2 i = floor(p);")
WriteLine(fw,"    vec2 f = fract(p);")
WriteLine(fw,"    f *= f * f * (3.0-2.0*f);")

WriteLine(fw,"    return mix(mix(Hash(i + vec2(0.,0.), s), Hash(i + vec2(1.,0.), s),f.x),")
WriteLine(fw,"               mix(Hash(i + vec2(0.,1.), s), Hash(i + vec2(1.,1.), s),f.x),")
WriteLine(fw,"               f.y) * s;")
WriteLine(fw,"}")

WriteLine(fw,"float factor(float len, float s, float e){")
WriteLine(fw,"	float v1 = 1.0 - 1.0 / exp(pow((s-len) * 6.0,2.0));")
WriteLine(fw,"	v1 = clamp(v1, 0.0, 1.0);")
WriteLine(fw,"	float v2 = 1.0 - 1.0 / exp(pow((len-e) * 6.0,2.0));")
WriteLine(fw,"	v2 = clamp(v2, 0.0, 1.0);")
WriteLine(fw,"	return (1.0-step(len,s))*v1 * (step(len,e))*v2;")
WriteLine(fw,"}")

WriteLine(fw,"float fbm(vec2 uv,float t,float len){")
WriteLine(fw,"     float v = 0.0;")
WriteLine(fw,"     vec2 p = uv+t;")
WriteLine(fw,"     v += noise(p*.5, 0.35);")
WriteLine(fw,"     v -= noise(p*2., 0.25);")
WriteLine(fw,"     v -= noise(p*4., 0.125);")
WriteLine(fw,"     v += noise(p*8., 0.0625);")
WriteLine(fw,"     return v*factor(length(uv),0.0,len);")
WriteLine(fw,"}")

WriteLine(fw,"vec2 rotate(vec2 uv,float degree){")
WriteLine(fw,"	mat2 rot = mat2(cos(degree),-sin(degree),sin(degree),cos(degree));")
WriteLine(fw,"	return rot*uv;")
WriteLine(fw,"}")

WriteLine(fw,"void main( void ) {")
WriteLine(fw,"	float size = min(resolution.x, resolution.y);")
WriteLine(fw,"	vec2 uv = gl_FragCoord.xy / size * 2.0 - resolution/size;")
WriteLine(fw,"	uv.x *= resolution.y/ resolution.x;")
WriteLine(fw,"  vec2 touch = vec2(1.0) - 2.0 * mouse/resolution;")
WriteLine(fw,"	uv = rotate(uv,atan(touch.y,-touch.x));")
WriteLine(fw,"	float t = width / distance(uv, vec2(clamp(uv.x,0.0,length(touch)),fbm(uv,time*speed,length(touch))));")
WriteLine(fw,"	vec3 finalColor = 0.3 * texture2D(backbuffer,gl_FragCoord.xy).rgb + t * color;")
WriteLine(fw,"	gl_FragColor =  vec4( finalColor, 1.0 );")
WriteLine(fw,"}")
CloseFile(fw)
endfunction

+ Code Snippet

// set window properties
SetWindowTitle( "thingy" )
SetWindowSize( 1024, 768, 0 )
SetWindowAllowResize( 1 ) // allow the user to resize the window

// set display properties
SetVirtualResolution( 1024, 768 ) // doesn't have to match the window
SetOrientationAllowed( 1, 1, 1, 1 ) // allow both portrait and landscape on mobile devices
SetSyncRate( 30, 0 ) // 30fps instead of 60 to save battery
SetScissor( 0,0,0,0 ) // use the maximum available screen space, no black borders
UseNewDefaultFonts( 1 ) // since version 2.0.22 we can use nicer default fonts

createShaderFile()
CreateSprite(1,0)
SetSpriteSize(1,1024,768)
SetSpritePosition(1,0,0)
LoadSpriteShader(1,"thingy.ps")
SetSpriteShader( 1,1 )

SetShaderConstantByName(1,"resolution",1024,768 ,0,0)
SetShaderConstantByName(1,"speed",1.0,0,0,0)
SetShaderConstantByName(1,"color",0.8,0.5,0.5,0)
SetShaderConstantByName(1,"width",0.015,0,0,0)

do
	SetShaderConstantByName(1,"time",timer(),0,0,0)
	SetShaderConstantByName(1,"mouse",GetPointerX(),getPointery(),0,0)

    sync()
loop
function createShaderFile()

fw=OpenToWrite("thingy.ps")

WriteLine(fw,"#ifdef GL_ES")
WriteLine(fw,"precision mediump float;")
WriteLine(fw,"#endif")
WriteLine(fw,"#extension GL_OES_standard_derivatives : enable")

WriteLine(fw,"")
WriteLine(fw,"uniform float     speed;    ")
WriteLine(fw,"uniform vec3      color;    ")
WriteLine(fw,"uniform float     width;    ")
WriteLine(fw,"uniform float     time;    ")
WriteLine(fw,"uniform vec2      mouse;          // mouse pixel coords. xy:")
WriteLine(fw,"uniform vec2      resolution;     // viewport resolution (in pixels)")
WriteLine(fw,"uniform sampler2D backbuffer;")

WriteLine(fw,"float Hash( vec2 p,  float s)")
WriteLine(fw,"{")
WriteLine(fw,"    vec3 p2 = vec3(p.xy,10.0 * abs(sin(s)));")
WriteLine(fw,"    return fract(sin(dot(p2,vec3(27.1,61.7, 12.4)))*273758.5453123);")
WriteLine(fw,"}")

WriteLine(fw,"float noise(vec2 p, float s)")
WriteLine(fw,"{")
WriteLine(fw,"    vec2 i = floor(p);")
WriteLine(fw,"    vec2 f = fract(p);")
WriteLine(fw,"    f *= f * f * (3.0-2.0*f);")

WriteLine(fw,"    return mix(mix(Hash(i + vec2(0.,0.), s), Hash(i + vec2(1.,0.), s),f.x),")
WriteLine(fw,"               mix(Hash(i + vec2(0.,1.), s), Hash(i + vec2(1.,1.), s),f.x),")
WriteLine(fw,"               f.y) * s;")
WriteLine(fw,"}")

WriteLine(fw,"float factor(float len, float s, float e){")
WriteLine(fw,"	float v1 = 1.0 - 1.0 / exp(pow((s-len) * 6.0,2.0));")
WriteLine(fw,"	v1 = clamp(v1, 0.0, 1.0);")
WriteLine(fw,"	float v2 = 1.0 - 1.0 / exp(pow((len-e) * 6.0,2.0));")
WriteLine(fw,"	v2 = clamp(v2, 0.0, 1.0);")
WriteLine(fw,"	return (1.0-step(len,s))*v1 * (step(len,e))*v2;")
WriteLine(fw,"}")

WriteLine(fw,"float fbm(vec2 uv,float t,float len){")
WriteLine(fw,"     float v = 0.0;")
WriteLine(fw,"     vec2 p = uv+t;")
WriteLine(fw,"     v += noise(p*.5, 0.35);")
WriteLine(fw,"     v -= noise(p*2., 0.25);")
WriteLine(fw,"     v -= noise(p*4., 0.125);")
WriteLine(fw,"     v += noise(p*8., 0.0625);")
WriteLine(fw,"     return v*factor(length(uv),0.0,len);")
WriteLine(fw,"}")

WriteLine(fw,"vec2 rotate(vec2 uv,float degree){")
WriteLine(fw,"	mat2 rot = mat2(cos(degree),-sin(degree),sin(degree),cos(degree));")
WriteLine(fw,"	return rot*uv;")
WriteLine(fw,"}")

WriteLine(fw,"void main( void ) {")
WriteLine(fw,"	float size = min(resolution.x, resolution.y);")
WriteLine(fw,"	vec2 uv = gl_FragCoord.xy / size * 2.0 - resolution/size;")
WriteLine(fw,"	uv.x *= resolution.y/ resolution.x;")
WriteLine(fw,"  vec2 touch = vec2(1.0) - 2.0 * mouse/resolution;")
WriteLine(fw,"	uv = rotate(uv,atan(touch.y,-touch.x));")
WriteLine(fw,"	float t = width / distance(uv, vec2(clamp(uv.x,0.0,length(touch)),fbm(uv,time*speed,length(touch))));")
WriteLine(fw,"	vec3 finalColor = 0.3 * texture2D(backbuffer,gl_FragCoord.xy).rgb + t * color;")
WriteLine(fw,"	gl_FragColor =  vec4( finalColor, 1.0 );")
WriteLine(fw,"}")
CloseFile(fw)
endfunction

Also extracted some attributes for you to alter.

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fubarpk

Retired Moderator

19

Years of Service

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Joined: 11th Jan 2005

Playing: AGK is my friend

Posted: 3rd Mar 2019 13:23

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Thanks Janbo that's brilliant
just what I wanted

fubar

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fubarpk

Retired Moderator

19

Years of Service

User Offline

Joined: 11th Jan 2005

Playing: AGK is my friend

Posted: 3rd Mar 2019 17:50 Edited at: 3rd Mar 2019 18:28

Link

heres kinda what I was thinking still lots to do

// set window properties
SetWindowTitle( "thingy" )
SetWindowSize( 1024, 768, 0 )
SetWindowAllowResize( 1 ) // allow the user to resize the window

// set display properties
SetVirtualResolution( 1024, 768 ) // doesn't have to match the window
SetOrientationAllowed( 1, 1, 1, 1 ) // allow both portrait and landscape on mobile devices
SetSyncRate(30, 0 ) // 30fps instead of 60 to save battery
SetScissor( 0,0,0,0 ) // use the maximum available screen space, no black borders
UseNewDefaultFonts( 1 ) // since version 2.0.22 we can use nicer default fonts
#constant thingyShd		=1
#constant white       	= MakeColor(255,255,255)

createShaderFile()
thingySpr=CreateSprite(0)
SetSpriteSize(thingySpr,1024,768)
SetSpritePosition(thingySpr,0,0)
LoadSpriteShader(thingyShd,"thingy.ps")
SetSpriteShader(thingySpr,thingyShd)
SetSpriteDepth(thingySpr,20)
SetSpriteActive(thingySpr,0)

type objType
	ID as integer
	xDir as float
	yDir as float
	Time as float
	enemy as integer
endtype

global objSpr as objType[]
global enemyLeft=0
createBoxes(20)

thingyWidth as float
thingyWidth=0.015
SetShaderConstantByName(thingyShd,"resolution",1024,768 ,0,0)
SetShaderConstantByName(thingyShd,"speed",1.0,0,0,0)
SetShaderConstantByName(thingyShd,"color",0.8,0.5,0.5,0)
SetShaderConstantByName(thingyShd,"width",thingyWidth,0,0,0)

colWidth as float
colWidth=10.0
colSpr=createSprite(0)
SetSpriteSize(colSpr,colWidth,300)
SetSpriteOffset(colSpr,colWidth*0.5,300)
SetSpriteShape(colSpr,3)
SetSpriteDepth(colSpr,10)
SetSpriteVisible(colSpr,0)
SetSpritePositionByOffset(colSpr,512,384)
score=0
do
	SetSpriteAngle(colSpr,360-getAngle(GetSpriteXByOffset(colSpr),GetSpriteYByOffset(colSpr),GetPointerX(),getPointerY()) ) 
	SetSpriteSize(colSpr,colWidth,distance(512,384,getPointerX(),getPointerY()))
	for num = objSpr.length to 0 step -1
		SetSpritePositionByOffset(objSpr[num].ID,objSpr[num].xDir+GetSpriteXByOffset(objSpr[num].ID),objSpr[num].yDir+GetSpriteYByOffset(objSpr[num].ID))
		//check if need to randomly change direction
		if timer() > objSpr[num].time+2
			objSpr[num].xDir=random2(-1.5,1.5)
			objSpr[num].yDir=random2(-1.5,1.5)
			objSpr[num].time=Timer()
		endif	
		
		//screen bounds
		if GetSpriteXByOffset(objSpr[num].ID)<0 then SetSpritePositionByOffset(objSpr[num].ID,1024,GetSpriteYByOffset(objSpr[num].ID))
		if GetSpriteXByOffset(objSpr[num].ID)>1024 then SetSpritePositionByOffset(objSpr[num].ID,0,GetSpriteYByOffset(objSpr[num].ID))
		if GetSpriteYByOffset(objSpr[num].ID)<0 then SetSpritePositionByOffset(objSpr[num].ID,GetSpriteXByOffset(objSpr[num].ID),768)
		if GetSpriteYByOffset(objSpr[num].ID)>768 then SetSpritePositionByOffset(objSpr[num].ID,GetSpriteXByOffset(objSpr[num].ID),0)	
		hit= GetSpriteCollision(objSpr[num].ID,colSpr ) 
		if hit=1 
			if objSpr[num].enemy=1
				thingyWidth=thingyWidth+0.0025:colWidth=colWidth+0.75
				SetShaderConstantByName(thingyShd,"width",thingyWidth,0,0,0)
				inc score,10:dec enemyLeft,1
			else
				thingyWidth=thingyWidth-0.0025:colWidth=colWidth-0.75
				SetShaderConstantByName(thingyShd,"width",thingyWidth,0,0,0)
				dec score,10
			endif	
			DeleteSprite(objSpr[num].ID)
			objSpr.remove(num)			
		endif		
	next

if enemyLeft <=0 
		deleteBoxes()
		createBoxes(20)
	endif
	print(score)
	print(ScreenFPS())
	
	SetShaderConstantByName(thingyShd,"time",timer(),0,0,0)
	SetShaderConstantByName(thingyShd,"mouse",GetPointerX(),getPointery(),0,0)

sync()
loop

function deleteBoxes()
	for num = objSpr.length to 0 step -1
		DeleteSprite(objSpr[num].ID)
		objSpr.remove(num)
	next 	
endfunction

function createBoxes(num as integer)
	newSpr as objType
	for t =1 to num
		newSpr.ID=createSprite(0)
		SetSpriteSize(newSpr.ID,20,20)
		SetSpritePosition(newSpr.ID,Random(100,924),Random(100,668))
		SetSpriteShape(newSpr.ID,3)
		SetSpriteDepth(newSpr.ID,10)
		newSpr.xDir=random2(-1.5,1.5)
		newSpr.yDir=random2(-1.5,1.5)
		newSpr.time=0
		if random(1,2)=1
			newSpr.enemy=1:inc enemyLeft,1
			SetSpriteColor(newSpr.ID,200,0,0,255)
		else
			newSpr.enemy=0
			SetSpriteColor(newSpr.ID,0,200,0,255)
		endif		
		objSpr.insert(newSpr)
	next t
endfunction

function distance(x1#,y1#,x2#,y2#)
	dx# = x2#-x1#
	dy# = y2#-y1#
	D# = sqrt(dx#*dx# + dy#*dy#)	
endfunction d#

function getAngle(x1#, y1#, x2#, y2#)   
    result# = ATan2(x1# - x2#,y1# - y2#)
endfunction result#

function createShaderFile()